Route · BWI → SFO · 2020–2025 BTS data
Baltimore to San Francisco
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to SFO (Baltimore to San Francisco) ranks #3629 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 83.9%
- On-time
- +4.9 pts
- vs US avg
- 61 min
- Delay when late
- 2,310
- Flights
- #3629 of 4927
- Corpus placement
Cancelled
1.9%
Best Month
May 2025 88%
Worst Month
Dec 2025 65%
Distance
2,457 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 86 | 30 | 1 | 1 | WN,UA |
| Nov 2025 | 80 | 15 | 0 | 0 | UA,WN |
| Oct 2025 | 106 | 16 | 0 | 0 | UA,WN |
| Sep 2025 | 85 | 21 | 0 | 0 | UA,WN |
| Aug 2025 | 103 | 26 | 0 | 0 | WN,UA |
| Jul 2025 | 115 | 32 | 1 | 0 | UA,WN |
| Jun 2025 | 110 | 27 | 1 | 0 | UA,WN |
| May 2025 | 67 | 8 | 0 | 0 | UA |
| Apr 2025 | 55 | 7 | 0 | 0 | UA |
| Mar 2025 | 33 | 3 | 0 | 0 | UA |
| Jan 2025 | 31 | 1 | 2 | 0 | UA |
| Dec 2024 | 33 | 2 | 0 | 1 | UA |
| Nov 2024 | 48 | 5 | 0 | 0 | UA |
| Oct 2024 | 48 | 5 | 0 | 0 | UA |
| Sep 2024 | 48 | 2 | 0 | 0 | UA |
| Aug 2024 | 50 | 9 | 2 | 0 | UA |
| Jul 2024 | 54 | 14 | 1 | 0 | UA |
| Jun 2024 | 30 | 13 | 1 | 0 | UA |
| May 2024 | 31 | 9 | 1 | 0 | UA |
| Apr 2024 | 30 | 1 | 0 | 0 | UA |
| Mar 2024 | 31 | 1 | 0 | 0 | UA |
| Jan 2024 | 31 | 2 | 15 | 0 | UA |
| Dec 2023 | 42 | 5 | 1 | 1 | UA |
| Nov 2023 | 49 | 3 | 0 | 0 | UA |
BWI–SFO seasonal on-time pattern
Best: March (93.0%) · weakest: June (73.9%)
Strongest calendar month
March
93.0% on-time · ~32 flights/mo
Busiest calendar month
July
~66 flights/mo avg
Weakest calendar month
June
73.9% on-time · ~58 flights/mo
Cancellation Rate
1.9%
26 of 1,396 flights
Diversion Rate
0.2%
3 of 1,396 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
BWI on-time profileSFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
SFO on-time profileCompare the two airports
See BWI and SFO side by side on delays, cancellations, and reliability.
Compare BWI vs SFOOrigin-hub reliability standing
Mid-pack among BWI departures
From BWI, this corridor sits with 53 other 75–85% on-time routes out of 64 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 11 below 75%). Destination: San Francisco · fleet on-time rank #1604 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–SFO.
Routes with a similar on-time rate
What the Data Says About BWI to SFO
Bureau of Transportation Statistics records show Baltimore to San Francisco (BWI to SFO) running a 83.9% on-time rate over 2,310 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 60.6 minutes. The 2,457-mile corridor is served by 3 carriers, and over the last 24 months 1.9% of 1,396 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: May 2025 posted the strongest performance at 88% on-time, while Dec 2025 came in at just 65% - a 23-point swing worth factoring into travel timing.
On the multi-year calendar, BWI–SFO peaks in March at 93.0% on-time while July carries the heaviest traffic (~66 flights per month) ; the softest month is June at 73.9%, a 19.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BWI to SFO rank among US routes by traffic? ▼
How often are flights delayed from BWI to SFO? ▼
What is the cancellation rate for BWI to SFO? ▼
How far is the flight from BWI to SFO? ▼
When is the best time to fly from BWI to SFO? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using BWI–SFO data
BWI–SFO runs 4.9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare BWI and SFO airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
- If your dates flex, March (93.0% on-time) beats June (73.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 83.9% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.